<html>
<body>
<h2>Hello World!</h2>
<form action="/logout" method="post">
    <input type="hidden" name="${_csrf.parameterName}" value="${_csrf.token}" />
    <input type="submit" value="signout" />
</form>
<div id="footer">
${numUsers } user(s) are logged in!
</div>
</body>
</html>
